Typically a tabular berg
rises about 130 feet from the sea surface and has a draught
of about 700 feet (40m and 213m respectively). With
sides that can go on for tens of miles, they make the biggest
and most powerful ships appear like little insects buzzing around
next to them. B15 at 300km long by 40km wide (186 x 25 miles)
represented about 50-100 years of advancement by the part of
the ice-shelf that it calved from.

Picture courtesy of Mike Usher
- Mike went on a Ross Sea expedition on board the Kapitan Khlebnikov
in 2005.You can purchase a selection of Mike's pictures
here